CVE-2019-0211

CVE-2019-0211 affects Apache HTTP Server 2.4.17–2.4.38 when using MPM event, worker, or prefork. The issue arises from code executing in less-privileged child processes/threads (including in-process scripting interpreters) that could be exploited to run arbitrary code with the privileges of the p...

CVE-2017-3167

CVE-2017-3167 affects Apache httpd 2.2.x prior to 2.2.33 and 2.4.x prior to 2.4.26. The issue is that third‑party modules using ap_get_basic_auth_pw() outside the authentication phase can bypass authentication requirements. Connected sources confirm the impact and upstream fixes: update to httpd ...

CVE-2018-1312

CVE-2018-1312 affects Apache httpd 2.2.0–2.4.29 where nonce generation for HTTP Digest authentication was not seeded with a proper pseudo-random seed. This allowed replay across servers in a common Digest configuration. Public advisories (CentOS, Debian, Arch Linux, ALT Linux) fix confirmed in ve...

CVE-2019-9513

CVE-2019-9513 (and related HTTP/2 CVEs) affect nginx and nghttp2. The issues enable denial of service via HTTP/2 resource loops and priority/window manipulation, causing high CPU/memory usage. nginx 1.16.x and nghttp2 are specifically named in advisories; remediation is upgrading to fixed package...

CVE-2023-44487

CVE-2023-44487 – HTTP/2 Rapid Reset DoS Root cause: HTTP/2 stream resets can cause servers to continue processing, leading to unbounded resource consumption and potential DoS when clients rapidly cancel streams. What’s affected: Various HTTP/2 implementations and deployments, including servers, p...

CVE-2019-9517

CVE-2019-9517 describes an attack against some HTTP/2 implementations where unconstrained internal data buffering can cause a denial of service. The vulnerability arises when an attacker floods a connection with a large number of requests for a large response object while manipulating HTTP/2 flow...

CVE-2021-40438

CVE-2021-40438 is an SSRF flaw in Apache HTTP Server 2.4.x through older revisions where a crafted request URI path can cause mod_proxy to forward the request to an origin server chosen by the remote user. The issue affects Apache httpd 2.4.48 and earlier; the CVSSv3.1 base score is 9.0 (CRITICAL...

CVE-2019-9511

CVE-2019-9511 is an HTTP/2 denial-of-service issue observed in multiple products where an attacker manipulates HTTP/2 window size and stream prioritization to force queuing of data in 1-byte chunks, potentially exhausting CPU/memory. Connected advisories confirm affected components include nginx ...

CVE-2017-9788

Apache httpd vulnerability CVE-2017-9788 stems from mod_auth_digest not initializing or resetting the value placeholder in Digest Proxy-Authorization headers between key=value assignments, which can leak previous memory data or cause a segfault/DoS. Affected: httpd 2.2.34 and 2.4.x prior to 2.4.2...

CVE-2019-9516

CVE-2019-9516 is an HTTP/2 header leak vulnerability affecting nginx and several Linux distributions. The issue occurs when an attacker sends streams with 0-length header names and values (optionally Huffman encoded), causing nginx to allocate memory for headers that may be kept until the session...

CVE-2016-8743

The CVE-2016-8743 issue affects Apache HTTP Server. It concerns how whitespace is accepted in requests and sent in response lines and headers in all releases before 2.2.32 and 2.4.25. The root problem is liberal whitespace handling, which can enable request smuggling, response splitting, and cach...

CVE-2019-0197

The CVE-2019-0197 entry concerns Apache HTTP Server 2.4.34–2.4.38. When HTTP/2 is enabled for an http: host or H2Upgrade is enabled for h2 on an https: host, an Upgrade request from http/1.1 to http/2 that is not the first request on a connection could cause misconfiguration and crash. Servers th...

CVE-2016-5387

CVE-2016-5387 affects Apache httpd prior to 2.4.25, where RFC 3875 compliance allows untrusted HTTP_PROXY data to influence outbound proxy selection via a crafted Proxy header (the httpoxy issue). Public docs indicate the issue arises from the HTTP_PROXY environment variable being exposed to appl...

CVE-2018-1333

CVE-2018-1333 affects Apache HTTP Server. By specially crafting HTTP/2 requests, workers could be allocated 60 seconds longer than necessary, causing worker exhaustion and denial of service. Affected versions: 2.4.18–2.4.30 and 2.4.33; fixed in 2.4.34. The vulnerability originates from the HTTP/2...

CVE-2018-17189

CVE-2018-17189 : In Apache HTTP Server 2.4.37 and earlier, mod_http2 can cause a DoS by handling slowloris-style request bodies, unnecessarily occupying a server thread for the h2 stream on HTTP/2 connections. Affected product: Apache HTTP Server with mod_http2. Impact: denial of service via thre...

CVE-2019-9514

CVE-2019-9514 corresponds to an HTTP/2 vulnerability where an attacker floods a peer by sending HEADERS frames, causing unbounded memory growth and potential DoS. Public details in connected advisories show affected stacks include Go HTTP/2 implementations and Go-based tools, with remediation via...

CVE-2021-3517

CVE-2021-3517 is a libxml2 vulnerability affecting versions before 2.9.11. A flaw in the xml entity encoding functionality could allow processing of a crafted XML file to trigger an out‑of‑bounds read, with availability impact and potential confidentiality/integrity impact if memory information i...

CVE-2021-3537

Summary: CVE-2021-3537 affects libxml2 up to 2.9.11. In XML mixed content parsing, errors were not propagated, causing a NULL dereference when an untrusted document is parsed in recovery mode and post-validated, with availability as the highest impact. The connected documents confirm the vulnerab...

CVE-2019-9518

CVE-2019-9518 describes a denial-of-service risk in HTTP/2 where a flood of frames with empty payloads (DATA, HEADERS, CONTINUATION, PUSH_PROMISE) and no end-of-stream flag can exhaust CPU and memory. Connected docs confirm concrete mentions across multiple ecosystems: Cloud Foundry products (emp...

CVE-2019-9515

CVE-2019-9515 concerns an HTTP/2 settings flood that can cause memory/CPU exhaustion. Arista’s security advisory (Security Advisory 0043) states the vulnerability is in Go’s gRPC HTTP/2 usage and can affect TerminAttr, OpenConfig, CVP, and certain Wi‑Fi OpenConfig-enabled components when enabled....

CVE-2021-3541

CVE-2021-3541 describes a vulnerability in libxml2 where exponential entity expansion can bypass protections and cause a denial of service. The Initial Description confirms the flaw and its DoS impact, and connected documents (e.g., Astra Linux bulletin and BSNSA entries) reiterate libxml2 involv...

CVE-2017-12613

CVE-2017-12613 affects the Apache Portable Runtime (APR) library: out-of-bounds memory access when apr_time_exp*() or apr_os_exp_time*() are given an invalid month, potentially exposing heap contents or triggering a denial of service. A fix was released in APR 1.6.3 (and later backported in some ...

CVE-2021-3518

CVE-2021-3518 details (libxml2): A use-after-free exists in libxml2 before v2.9.11 when processing crafted input files through an application linked with libxml2. This can impact confidentiality, integrity, and availability. The issue is triggered by processing a specially crafted file via libxml...

CVE-2021-3516

CVE-2021-3516 affects libxml2’s xmllint prior to 2.9.11. The issue is a use-after-free in xmllint when processing a crafted file, with impact to confidentiality, integrity, and availability. Remediation: update libxml2 to 2.9.11 or later (or apply vendor patch). The connected sources corroborate ...

CVE-2020-25709

CVE-2020-25709 is an OpenLDAP vulnerability where processing a malicious packet by slapd can trigger an assertion failure, primarily threatening availability. The affected component is OpenLDAP’s slapd with a focus on Certificate List syntax validation. Public advisories confirm a denial-of-servi...

CVE-2020-25710

Summary of CVE-2020-25710 (OpenLDAP) : A vulnerability in OpenLDAP prior to 2.4.56 allows an attacker sending a crafted packet to cause a failed assertion in csnNormalize23(), with the highest impact on availability (DoS). The issue is rooted in OpenLDAP’s handling of CSN normalization when proce...

CVE-2018-11759

CVE-2018-11759 affects the Apache Tomcat JK Connector (mod_jk) when used with Apache httpd: connector versions 1.2.0 through 1.2.44, due to edge-case handling in httpd path normalization, could allow exposure of application functionality via the reverse proxy and may bypass httpd access controls....

CVE-2016-3627

CVE-2016-9596, related to libxml2 used in Red Hat JBoss Core Services, allows a denial of service via crafted XML when in recovery mode. This vulnerability exists because of an incorrect fix for CVE-2016-3627 and results in stack consumption. The issue is specifically described as a DoS (stack gr...

CVE-2025-6021

Affects libxml2: multiple vendors report CVE-2025-6021 (integer overflow in xmlBuildQName causing stack-based buffer overflow). Documents show vulnerable libxml2 variants across distributions (e.g., AWS ALAS advisories for libxml2 with 2.9/2.10 lines; AIX advisory listing affected filesets; Astra...

CVE-2025-6170

CVE-2025-6170 affects libxml2’s xmllint interactive shell. A stack-based buffer overflow in the command-parsing logic can cause crashes and, in rare configurations, may allow code execution. Related connected documents show patches/updates across distributions: Debian LTS advisory and Debian secu...

CVE-2026-0989

CVE-2026-0989 concerns a flaw in the RelaxNG parser in libxml2 where external schema inclusions can cause unbounded recursion, leading to stack exhaustion and denial-of-service crashes. The connected documents confirm this issue across multiple distributions (e.g., Amazon Linux 2/ALAS advisories,...

CVE-2026-0990

Vulnerability: CVE-2026-0990 affects libxml2. An uncontrolled recursion bug in xmlCatalogXMLResolveURI is triggered when a delegate URI entry references itself, allowing a remote attacker to craft an XML catalog that causes infinite recursion and stack exhaustion, resulting in DoS via application...

CVE-2016-9598

CVE-2016-9598 affects libxml2 as used in Red Hat JBoss Core Services. The vulnerability is a denial-of-service due to an out-of-bounds read in libxml2 triggered by a specially crafted XML document, which can crash the application. Note that this issue exists because of a missing fix for CVE-2016-...

CVE-2016-9596

CVE-2016-9596 is a libxml2-based denial-of-service issue observed in Red Hat JBoss Core Services, triggered by a crafted XML document while in recovery mode. The linked CNVD entry corroborates a DoS via a crafted XML document, noting a stack-related impact (stack corruption/DoS) and that it arise...

CVE-2026-6732

CVE-2026-6732 affects libxml2 and is triggered when parsing an XSD-validated document that contains an internal entity reference, causing a type confusion error and a DoS via crashes. The vulnerability is tied to how libxml2 processes crafted XML Schema Definition inputs, with the impact describe...

CVE-2026-0992

CVE-2026-0992 in libxml2 describes an uncontrolled resource consumption vulnerability. A remote attacker can supply crafted XML catalogs containing repeated elements pointing to the same downstream catalog, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU us...